A grating monochromator has the wavelength of 500 nm with line width of 0.002 nm. For the first order grating, which is ruled at 2400 grooves/mm Minimum theoretical size of grating needs to be calculated.
Minimum theoretical size grating monochromator will be calculated by using the formula of resolving power, which is given as-
Δλ = wavelength difference
n = diffraction order
N = total number of slits
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